Sprinkle cooked chicken evenly over top of cooked macaroni in dish. Spread frozen vegetables on top of chicken.

4

In same skillet, melt 3 tablespoons butter over medium heat. With whisk, scrape any browned bits from bottom of skillet into butter. Stir in flour with whisk until paste forms. Gradually stir in milk, beating with whisk. Stir in onion salt, 2 cups of the cheese and the soup until mixture is smooth and well combined. Pour cheese mixture over vegetables in dish.